The engineered strain MG136-pMG36e-GLP-1 was assessed as having a neuroprotective effect on AD and Parkinson’s disease mice due to the probiotic properties of Lactococcus lactis MG1363 and the continuously generated glucagon-like peptide-1 (GLP-1) from the engineered strain [30]. The gene discussed is GCG; the disease is Parkinson disease.